Had one as my second car when I was younger and on P's as well lol, got a 14.6 out of it before the stally, low 14's were done by the guy after me unsure what the size was.
HP4 chiptorque chip
surecam cam custom grind
head ported/polished at gilberts on the goldcoast *mild*
CAI
did a 15.3 with out diff gears, and a 14.6 with them. 3.9's with an LSD in full street trim.
agreed with the ditch the 20's idea... well the dinner plates that are on it anyways, set of Dark agents or ROH medina's in a 19" would look mint but that's IMO
otherwise, great base to start with, they are a great cruiser and one of the nicest shapes of fairlanes bar none.